IBM pSeries 630 6C4 Service Manual page 158

Step 1542-25
1. Turn off the power.
2. Disconnect the I/O subsystem power cables.
3. Replace the following parts, one at a time, in the sequence listed:
a. Attached external device cable.
b. Attached external device(s), one at a time, if more than one.
c. I/O subsystem backplane (U0.dd-P1).
4. Reconnect the I/O subsystem power cables.
5. Turn on the power.
6. Boot standalone diagnostics from CD.
7. If the Please define the System Console screen is displayed, follow directions to select the system
console.
8. Use the Display Configuration and Resource List to list all attached devices and adapters (refer to the
RS/6000 Eserver pSeries Diagnostic Information for Multiple Bus Systems, order number SA38-0509,
if necessary).
9. Check that all attached devices and adapters are listed.
Did the Please define the System Console screen display and are all attached devices and adapters
listed?
NO Replace the next part in the list and return to the beginning of this step. Repeat this process until
a part causes the Please define the System Console screen to be displayed and all attached
devices and adapters to be listed. If you have replaced all the items listed above and the Please
define the System Console screen does not display or all attached devices and adapters are not
listed, check any external devices and cabling. If you do not find a problem, contact your next level
of support for assistance.
YES Go to "Step 1542-16" on page 134.
138 Eserver pSeries 630 Model 6C4 and Model 6E4 Service Guide